<main class="main">
	<h2>Come join us</h2>
	<p>测试</p>
</main>
<aside class="sidebar">
	<div class="widget"/>
	<div class="widget"/>
</aside>
<style>
.main{
	box-sizing:border-box;
	float:left;
	width:70%;
	background-color:#fff;
	border-radius:.5em;
}
.sidebar{
	box-sizing:border-box;
	float:left;
	width:30%;
	padding:1.5em;
	background-color:#fff;
	border-radius:.5em;
}
</style>